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true

 
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does downshifting in a automatic hurt the engine?

 
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Lmao so true...nothing like a test drive on a new civic with only 18 miles on it and going from 5th to 2nd gear because I'm not use to a close ratio gear box. Talk about some neck pain.

 
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downshifting does not hurt the engine no. it just puts a tad bit more stress on the trans.

 
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so in a sense its bad? is it ok to push it in another gear while going like 40 mph? like from D to D3.

 
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its harder on the gears to force it by shifting the gear select. try to avoid it and leave the car in a lower gear like d3 if you are driving in hilly areas then you wont have to worry about downshifting.

 
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'05 stopped pulling when I hit redline. Was pulling out of a parking lot and someone came careening down a hill and around a corner, so my mind was more on "OH CRAP" and accelerating to avoid getting hit. Didn't notice I was gonna hit redline until about 1/2 a second before. When I hit, the transmission wasn't pulling anymore. I went into neutral, shifted back into gear, and everything was fine. I guess it cuts you off before you blow the engine?

Stupid story from my youth:

First car I had was a '92 Escort. Not like the new pieces of crap they were putting out at the end, the '92s had some ***** - not even the '06 Lancer I used to have felt as strong. Smoother yes, but the Escort stock would prolly win.

Anyways - before I knew jack about cars, I took that auto transmission and "experimented." I found that by shifting to one of the Ds it got louder and accelerated faster. About two months later I couldn't get into first gear and ended up getting the transmission replaced. Wasn't until I started learning about cars that I found out I was just straining my lower gears. How's that for stupid? Oh well - learn as we go.

 
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^ good job at bringing back liek 10 old threads

 
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i have an 01 si and my engine was clicking as well then my alternator went .. after i replaced it there was no clicking....so that way be the problem, a shot bearing in your alt.